a water-cooled oxygen lance is lowered to within about a meter of the molten iron and high purity oxygen is blown on to the iron. The oxidation process begins. This oxidation produces heat, so no outside heat is needed.是什么意思_a water-cooled oxygen lance is lowered to within about a meter of the molten iron and high purity oxygen is blown on to the iron. The oxidation process begins. This oxidation produces heat, so no outside heat is needed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句